Send and receive MMS. With the ability to save full-size MMS attachments to the phone's SD card, or to the local computer via web interface.
Also, attach MMS, using either items from the phone, or from the local computer via web interface.
True MMS and SMS functionality would be a good thing.
Display the message and Pix in the AirDroid window...
I hope that in time there will indeed be a back up and recovery of both SMS & MMS messages.